code: def init_class_fixtures(cls):
      super(TestDateUtils, cls).init_class_fixtures()
      cls.calendar = get_calendar("XNYS")
  
file_path: zipline/tests/utils/test_date_utils.py
imports: from pandas import Timestamp
  from nose_parameterized import parameterized
  from trading_calendars import get_calendar
  from zipline.testing import ZiplineTestCase
  from zipline.utils.date_utils import compute_date_range_chunks
label_desc: Use image node_id 1 for calling the TestDateUtils obj's underlying member method code with example usage: obj.init_class_fixtures(cls) without return types